I think there are some production (hopefully not design!) issues with some of these tablets related to the touch panel.
Mine *loses* any idea that the screen is being pressed some places in the lower left quadrant of the screen if I apply just slightly too much pressure.
I noticed this in "Pew Pew" but wasn't sure if it was perhaps just a software bug, then I noticed it again in JetCarStuntsLight in that my rocket boost (left on screen button) would shut right off if I pressed just a little too hard.
It does not seem to happen if the tablet is resting on a flat surface (or harder to consistently reproduce for sure), but only if I am holding it with lower corners resting on my lower part of my palms, fingers behind, pressing with my thumbs.
It isn't nearly as obvious, but I can tell just using the samsung keyboard if this problem exists or not : with the Sammy keyboard, if you hold a key , you should get a pop-up of options (often just capital version of the letter), and this always works for letters on the rightmost side of the keyboard (like, press/hold "l" and see "L" pop up). This works no matter how hard (within reason...I'm not a brute and have had dozens of multitouch devices so don't break the glass and blame me!) I press for letters like "L".
It varies a little based upon whether I am pressing my fingers on the back or not, but in general, I can easily reproduce the "press too hard and don't get the pop-up" problem on letters like "s" and "d" ("a" only happens if I am pressing somewhat with my fingers on the back ). I can actually see the problem on w,e,r,t,y,u, even i and occasionally o and p...
The problem can also be seen with the Android (US) keyboard... here there aren't as many pop-ups (like no caps option if held longer) but the "tell" is whether the key stays illuminated blue as you hold down and press harder or loses the fact that you are pressing it and goes black. With light pressure holding "s" on the Android keyboard, I get the German "